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  <title>Calculates binomial coefficient</title>
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  <div id="layout-content"><div id="function.gmp-binomial" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">gmp_binomial</h1>
  <p class="verinfo">(PHP 7 &gt;= 7.3.0)</p><p class="refpurpose"><span class="refname">gmp_binomial</span> &mdash; <span class="dc-title">Calculates binomial coefficient</span></p>

 </div>

  <div class="refsect1 description" id="refsect1-function.gmp-binomial-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>gmp_binomial</strong></span>
    ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$n</code></span>
   , <span class="methodparam"><span class="type">int</span> <code class="parameter">$k</code></span>
    ) : <span class="type"><a href="class.gmp.html" class="type GMP">GMP</a></span></div>

  <p class="para rdfs-comment">
   Calculates the binomial coefficient C(n, k).
  </p>
 </div>



  <div class="refsect1 parameters" id="refsect1-function.gmp-binomial-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">n</code></dt>

     <dd>

      <p class="para">可以是一个 GMP
数据 <span class="type"><span class="type resouce">resouce</span></span>，或一个可以转换为数值的字符串。</p>
     </dd>

    
    
     <dt>
<code class="parameter">k</code></dt>

     <dd>

      <p class="para">

      </p>
     </dd>

    
   </dl>

  </p>
 </div>


  <div class="refsect1 returnvalues" id="refsect1-function.gmp-binomial-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the binomial coefficient C(n, k),  或者在失败时返回 <strong><code>FALSE</code></strong>.
  </p>
 </div>

 

 <div class="refsect1 errors" id="refsect1-function.gmp-binomial-errors">
  <h3 class="title">错误／异常</h3>
  <p class="para">
   Issues E_WARNING if <code class="parameter">k</code> is negative.
  </p>
 </div>


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